I've tried Googling this without much luck; I'm having a problem with the launcher on Catalina (though the problem occurred before Catalina, as well.) I can open the launcher fine. It will display the small "Downloading" window like it's downloading an update for the launcher, but then close and never open the larger login window that usually downloads game files. I've tried repairing via the Terminal, which does nothing. The only thing that seems to works is re-downloading and reinstalling, which deletes all game data, making me download it over again, wreaking havoc on my data cap. Is there a known fix for this?